JP4516292B2 - Clock dial - Google Patents

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JP4516292B2
JP4516292B2 JP2003299418A JP2003299418A JP4516292B2 JP 4516292 B2 JP4516292 B2 JP 4516292B2 JP 2003299418 A JP2003299418 A JP 2003299418A JP 2003299418 A JP2003299418 A JP 2003299418A JP 4516292 B2 JP4516292 B2 JP 4516292B2
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pattern
dial
shape
circle
refracting
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JP2005069842A (en
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泰彦 高山
元喜 伊藤
正昭 佐藤
山口  克行
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Citizen Holdings Co Ltd
Citizen Watch Co Ltd
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Citizen Holdings Co Ltd
Citizen Watch Co Ltd
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Description

本発明は、ソーラセル(太陽電池)付の時計用文字板に関し、特に、ソーラセルの濃紫色を和らげる技術に関する。   The present invention relates to a timepiece dial with a solar cell (solar cell), and more particularly to a technique for softening the dark purple color of a solar cell.

ソーラセルを用いた時計は、一般に、文字板の下面側にソーラセルを配設し、光透過性の文字板を使用して、文字板から透過した光を受光させて発電作用を起こす構造を取っている。ところが、ソーラセルは独特の濃紫色を呈しており、この濃紫色が透過性の文字板から見えることから外観色調として良い感情を受けなかった。そこで従来から、この濃紫色を和らげるための色々な工夫が数多くなされてきた。その一つに、下記の特許文献1に開示された技術がある。以下、この特許文献1に示されたところの図を用いてその技術内容を説明する。   A watch using a solar cell generally has a structure in which a solar cell is disposed on the lower surface side of the dial plate, and a light-transmitting dial plate is used to receive light transmitted from the dial plate to generate a power generation action. Yes. However, the solar cell had a unique dark purple color, and since this dark purple color was visible from the transparent dial, it did not receive a good feeling as an appearance color tone. Therefore, various contrivances have been made so far to soften this deep purple color. One of them is the technique disclosed in Patent Document 1 below. The technical contents will be described below with reference to the diagram shown in Patent Document 1.

特開2003−110129号公報(3〜4頁、図1)JP 2003-110129 A (3-4 pages, FIG. 1)

図7に示すものは上記特許文献1に示されたマスク板(文字板)の形状を示す図で、(a)図は断面図、(b)図は(a)図における屈折面の平面図を示している。また、図8は図7における屈折面の変形例を示した断面図、図9は図7における屈折面の他の形状を示したもので、(a)図は平面図、(b)図は(a)図におけるA−A断面図を示している。尚ここで、特許文献1においてはマスク板を文字板として使用しているので、以降、マスク板を文字板と呼称して説明することにする。   FIG. 7 is a diagram showing the shape of the mask plate (dial plate) disclosed in Patent Document 1, wherein FIG. 7A is a cross-sectional view, and FIG. 7B is a plan view of a refracting surface in FIG. Is shown. 8 is a sectional view showing a modification of the refracting surface in FIG. 7, FIG. 9 shows another shape of the refracting surface in FIG. 7, (a) is a plan view, and (b) is a diagram. (A) The AA sectional view in a figure is shown. Here, since the mask plate is used as a dial plate in Patent Document 1, the mask plate is hereinafter referred to as a dial plate.

図7に示された文字板1は、透明な樹脂を用いて下面に屈折面1a、上面に模様面1bを形成して射出成形で形成している。下面の屈折面1aはストライプ状に、即ち、多数の平行する三角柱プリズム面の形状を取っている。そして、この三角柱プリズム面は粗面加工を施した面になっている。また、上面の模様面1bは必要に応じて文字面を装飾する凹凸模様を形成した模様面になっている。   The dial 1 shown in FIG. 7 is formed by injection molding using a transparent resin and forming a refractive surface 1a on the lower surface and a pattern surface 1b on the upper surface. The lower refracting surface 1a is in the form of stripes, that is, in the form of a number of parallel triangular prism surfaces. The triangular prism surface is a roughened surface. Further, the upper pattern surface 1b is a pattern surface in which an uneven pattern for decorating the character surface is formed as necessary.

図8に示されたものは、図7に示された文字板1の屈折面1a、即ち、ストライプ状に形成した三角柱プリズム面形状の屈折面の変形例としてストライプ状に形成した円筒型レンズ面形状を屈折面1aとしたものである。   8 shows a refracting surface 1a of the dial plate 1 shown in FIG. 7, that is, a cylindrical lens surface formed in a stripe shape as a modification of the refracting surface of the triangular prism prism surface shape formed in a stripe shape. The shape is the refractive surface 1a.

また、図9に示されたものは、図7に示された文字板1の屈折面1aを四角錐のマイクロプリズム面の形状に形成したものである。   Further, what is shown in FIG. 9 is one in which the refractive surface 1a of the dial 1 shown in FIG. 7 is formed in the shape of a quadrangular pyramid microprism surface.

上記の特許文献1においては、文字板にこのような屈折面を設けることにより、更には、屈折面を粗面にすることによりソーラセルの濃紫色を隠すことができるとされている。   In the above-mentioned patent document 1, it is said that the dark purple of the solar cell can be hidden by providing such a refracting surface on the dial, and further by making the refracting surface rough.

しかしながら、屈折面にストライプ状の凹凸を設けた場合に、図7の(b)図のごとく凹凸のストライプ線を縦方向にした位置で文字板を見た場合にはソーラセルの濃紫色は殆ど目立たないが、図10に示すように凹凸のストライプ線を横方向の位置にして見た場合にはソーラセルの濃紫色が見えるようになってくる。図10は図7(b)図に示した屈折面であるストライプ状の三角柱プリズム面を横向きに配置して両目で見た状態を示した図である。P1、P2は見る人の両目を示しており、Q1、Q2は見た位置の視点を示している。   However, in the case where the refracting surface is provided with stripe-like irregularities, the dark purple color of the solar cell is almost noticeable when the dial is viewed at the position where the irregular stripe lines are vertically arranged as shown in FIG. 7B. However, as shown in FIG. 10, when the uneven stripe line is viewed in the horizontal direction, the dark purple color of the solar cell becomes visible. FIG. 10 is a diagram showing a state in which the stripe-shaped triangular prism prism surface, which is the refracting surface shown in FIG. P1 and P2 indicate both eyes of the viewer, and Q1 and Q2 indicate the viewpoints of the viewed positions.

図11はストライプ状に形成した三角柱プリズム面からなる屈折面1aの光の屈折状態を説明する説明図で、三角柱プリズム面を上面に向けた状態を描いている。真上から入射した入射光R1、R2はプリズム面のそれぞれの入射点Q1、Q2の位置で屈折を起こし、S1、S2の屈折光になってプリズム内を直進し、再び、プリズム外に放射される。ストライプ状の三角柱プリズム面においては、面そのものが同じ角度を持って同一方向に向いた平面で形成されており、光の入射点Q1、Q2は傾斜角などを含めた形状が全く同じ形状になっているため、屈折光S1、S2は全く同じ方向に屈折をなして直進する。従って、図10に示すように、ストライプ状の三角柱プリズム面を横向きに配置して見た場合に、ストライプ線に沿ってソーラセルの濃紫色が見えるようになってくる。また、この三角柱プリズム面を粗面に仕上げたにしてもその濃紫色が多少和らぐ程度で全く濃紫色が見えなくなると云う状態にはなっていなかった。   FIG. 11 is an explanatory view for explaining the light refraction state of the refracting surface 1a formed of a triangular prism surface formed in a stripe shape, and shows a state where the triangular prism surface is directed to the upper surface. The incident lights R1 and R2 incident from directly above are refracted at the respective incident points Q1 and Q2 on the prism surface, become refracted lights of S1 and S2, travel straight through the prism, and are radiated out of the prism again. The In the striped triangular prism prism surface, the surface itself is formed as a plane having the same angle and facing the same direction, and the light incident points Q1 and Q2 have the same shape including the inclination angle. Therefore, the refracted lights S1 and S2 travel straight and refract in exactly the same direction. Accordingly, as shown in FIG. 10, when the striped triangular prism surface is arranged horizontally, the dark purple color of the solar cell can be seen along the stripe line. Further, even when the triangular prism surface was finished to be rough, it was not in a state where the dark purple was completely invisible to the extent that the dark purple was slightly softened.

また、屈折面が図8に示すような円筒型のレンズ形状の場合であっても濃紫色は完全に見えなくなる状態にはなっていなかった。   Further, even when the refracting surface has a cylindrical lens shape as shown in FIG. 8, the dark purple color is not completely invisible.

屈折面を図9に示すような四角錐のマイクロプリズム面にした場合にはソーラセルの濃紫色はほぼ見えない状態が得られるが、原型の製作費が非常に高いコストになっていた。図7、図8、図9に示す屈折面を得るには、この形状と同じ形状の原型を製作し、これに電鋳メッキを行って射出成形のキャビティ金型を製作する。非常に凹凸寸法が小さく、図7、図8に示すストライプ状の模様、あるいは図9に示すようなマイクロプリズム形状の模様の原型を製作するのに高価な精密加工設備を必要とし、比較的安いNC加工旋盤などでは容易に製作できない。   When the refracting surface is made into a quadrangular pyramid microprism surface as shown in FIG. 9, the dark purple color of the solar cell is almost invisible, but the production cost of the prototype is very high. In order to obtain the refracting surfaces shown in FIGS. 7, 8, and 9, an original mold having the same shape as this is manufactured, and electroforming plating is performed on this, thereby manufacturing an injection mold cavity mold. The size of the irregularities is very small, and expensive precision processing equipment is required to produce a stripe pattern as shown in FIGS. 7 and 8 or a microprism pattern as shown in FIG. It cannot be easily manufactured with NC machining lathes.

また、文字板1の上面の模様面1bにサークル状の凹凸模様や旭光の凹凸模様などを形成した場合、模様面1bの模様線と下面の屈折面のストライプ模様の模様線との交差する部位に沿って光の干渉縞(モアレ縞)が現れて外観品質を悪くするものとなっていた。   Further, when a circle-shaped uneven pattern or an Asahi light uneven pattern is formed on the upper pattern surface 1b of the dial 1, the portion where the pattern line of the pattern surface 1b intersects the pattern line of the stripe pattern of the lower refractive surface Interference fringes (moire fringes) of light appeared along the line and deteriorated the appearance quality.

本発明は上記の問題に鑑みて成されたもので、その目的とするところは、原型を安いコストで製作して、そして、完全にソーラセルの濃紫色が見えなく、且つ、モアレ縞が現れない文字板を得るものである。   The present invention has been made in view of the above-mentioned problems. The object of the present invention is to manufacture a prototype at a low cost, and not completely see the dark purple color of the solar cell and no moiré stripes. Get the dial.

この目的を達成する手段として、本発明の請求項1に記載の時計用文字板は、ソーラセルを下面側に備え、多数のプリズムあるいはレンズ状の凹凸からなる屈折面を下面に形成した時計用文字板であって、前記屈折面の凹凸は三角形のプリズム形状あるいは半円形のレンズ形状をなしてサークル状又は渦巻き状の模様に形成した時計用文字板において、前記文字板の上面は凹凸を有する模様面になっており、該模様面が前記屈折面に形成したサークル状又は渦巻き状の模様と同一模様を同一ピッチ間隔に、位置を合わせて形成したことを特徴とするものである。 As a means for achieving this object, the timepiece dial according to claim 1 of the present invention is provided with a solar cell on the lower surface side and a refractive surface made up of a large number of prisms or lens-like irregularities formed on the lower surface. pattern a plate, the unevenness of the refracting surface in the timepiece dial formed in a circle shape or a spiral pattern to form a prism-shaped or semi-circular lens shape of a triangle, an upper surface of the dial is having an irregular The pattern surface is the same pattern as the circle or spiral pattern formed on the refracting surface, and is formed by aligning the positions at the same pitch interval .

また、本発明の請求項2に記載の時計用文字板は、サークル状又は渦巻き状の模様に形成した凹凸は、そのピッチ間隔を30〜150μmの範囲内で、且つ、同じピッチ間隔で形成したことを特徴とするものである。   Further, in the timepiece dial according to claim 2 of the present invention, the unevenness formed in a circle or spiral pattern has a pitch interval in the range of 30 to 150 μm and is formed at the same pitch interval. It is characterized by this.

屈折面の凹凸をサークル状又は渦巻き状の模様に形成すると、屈折面が曲面になっているのでソーラセルからの反射光が決して同じ方向に屈折せず、四方に散らばった形で光が屈折する。従って、屈折光の散乱が著しくなってソーラセルの濃紫色を消してしまう効果が大きく現れる。これによって、文字板から濃紫色が見えなくなり、文字板をどの方角から見ても見え方が同じになり、違和感がなくなり高級感を感じさせる。   When the concavo-convex pattern of the refracting surface is formed in a circle or spiral pattern, the refracting surface is a curved surface, so that the reflected light from the solar cell is never refracted in the same direction, and the light is refracted in a scattered manner. Therefore, the effect of eliminating the deep purple of the solar cell due to the significant scattering of the refracted light appears greatly. As a result, the dark purple color cannot be seen from the dial, and the dial looks the same regardless of the direction from which it is seen.

また、サークル状又は渦巻き状の模様に形成した凹凸のそのピッチ間隔を30〜150μmの範囲内で形成すると、凹凸模様そのものが見えないので外観的に違和感を与えない。また、凹凸を全て同じピッチ間隔に形成することによって、屈折光の散乱の分布に均一性が現れ、得られる文字板の明るさ暗さの明暗にムラがなくなる。着色を施した文字板にあってはその色調の明暗にムラが発生しない。   In addition, if the pitch interval of the irregularities formed in a circle or spiral pattern is formed within a range of 30 to 150 μm, the irregular pattern itself cannot be seen, so that the appearance is not strange. Further, by forming all the concaves and convexes at the same pitch interval, uniformity appears in the distribution of refracted light scattering, and there is no unevenness in the darkness of the resulting dial. In the colored dial, unevenness does not occur in light and dark colors.

また、三角形のプリズム形状や半円形のレンズ形状に凹凸を形成して、それをサークル状又は渦巻き状の模様に形成するのは、比較的簡単に、しかも安価に製作することができる。原型をNC加工旋盤で簡単に製作できるからである。   Forming irregularities in a triangular prism shape or semicircular lens shape and forming it into a circle or spiral pattern can be produced relatively easily and inexpensively. This is because the prototype can be easily manufactured with an NC machining lathe.

また、上面の模様面に、屈折面のサークル状又は渦巻き状の模様と同じ模様を同一ピッチ間隔に、いちを合わせて形成すると、模様面に形成したサークル状又は渦巻き状の模様にモアレ縞の発生がなくなり外観的に向上した見栄えの良い文字板が得られる。   In addition, when the same pattern as the circle or spiral pattern of the refracting surface is formed at the same pitch interval on the upper pattern surface, the moiré fringes are formed on the circle or spiral pattern formed on the pattern surface. There is no occurrence and a good-looking dial with improved appearance is obtained.

また、模様面を粗面にすることによってソーラセルからの反射した屈折・透過光が更にその粗面で分散するので、ソーラセルの濃紫色が更に一層掻き消されてしまう。   Further, by making the pattern surface rough, the reflected / transmitted light reflected from the solar cell is further dispersed on the rough surface, so that the dark purple color of the solar cell is further erased.

そして、サークル状の模様や渦巻き状の模様を作るところの原型はNC加工旋盤で簡単に製作できるので、原型を安いコストで製作することができる。   Since the original pattern for creating a circle pattern or a spiral pattern can be easily manufactured with an NC machining lathe, the original pattern can be manufactured at a low cost.

以下、本発明の最良の実施形態を図1〜図6を用いて説明する。図1は本発明の第1実施形態に係る時計用文字板の要部断面図と平面図を示していて、図1の(a)図は要部断面図、(b)図は(a)図における屈折面の平面図を示している。また、図2は図1における屈折面の光の屈折状況を説明する説明図を示している。また、図3は図1におけるB部の拡大図を示している。図4は本発明の第2実施形態に係る時計用文字板の屈折面の平面図を示している。また、図5は本発明の第3実施形態に係る時計用文字板の要部断面図と平面図を示していて、図5の(a)図は要部断面図、(b)図は(a)図における屈折面の平面図を示している。また、図6は本発明の第4実施形態の時計用文字板の要部断面拡大図を示している。   Hereinafter, the best embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows a cross-sectional view and a plan view of a main part of a timepiece dial according to a first embodiment of the present invention. FIG. 1 (a) is a cross-sectional view of the main part, and FIG. The top view of the refractive surface in a figure is shown. FIG. 2 is an explanatory view for explaining the refraction state of light on the refracting surface in FIG. FIG. 3 shows an enlarged view of a portion B in FIG. FIG. 4 shows a plan view of the refracting surface of the timepiece dial according to the second embodiment of the present invention. FIG. 5 shows a cross-sectional view and a plan view of the main part of a timepiece dial according to the third embodiment of the present invention. FIG. 5 (a) is a cross-sectional view of the main part, and FIG. a) The top view of the refractive surface in a figure is shown. FIG. 6 shows an enlarged cross-sectional view of the main part of the timepiece dial according to the fourth embodiment of the present invention.

本発明の時計用文字板はソーラセルの上面側に配設して用いられ、透明なアクリル樹脂やポリカーボネイト樹脂などを用いて射出成形などで形成する。図1に示すものは、本発明の第1実施形態に係る時計用文字板の形状を示したもので、(a)図はその要部断面図、(b)図は(a)図における屈折面の平面図を示している。図1から、この文字板10は、下面に屈折面10aを設けており、上面に模様面10bを設けている。また、文字板10の中心には小孔10dを設けており、この小孔10dから指針が取り付けられるようになっている。尚、ここでの文字板10は射出成形上がりのブランク状態の形状を示しており、後に、塗装、蒸着、メッキ、印刷などの表面処理が施されて完成文字板に仕上げられる。   The timepiece dial of the present invention is used by being disposed on the upper surface side of the solar cell, and is formed by injection molding or the like using a transparent acrylic resin or polycarbonate resin. FIG. 1 shows the shape of the timepiece dial according to the first embodiment of the present invention. FIG. 1 (a) is a sectional view of the main part, and FIG. 1 (b) is a refraction in FIG. A plane view of the surface is shown. As shown in FIG. 1, the dial 10 has a refracting surface 10a on the lower surface and a pattern surface 10b on the upper surface. A small hole 10d is provided in the center of the dial plate 10, and a pointer can be attached from the small hole 10d. Here, the dial plate 10 shows the shape of a blank state after injection molding, and is then finished with a surface treatment such as painting, vapor deposition, plating, and printing.

文字板10の下面に設けた屈折面10aは凹凸を設けた面になっており、三角形のプリズム形状を形成する凹凸になっている。そして、その凹凸は、(b)図に示すように、一定のピッチ間隔に並んでサークル状の模様を形成している。また、文字板10の上面に設けた模様面10bは、屈折面10aと同じ模様、即ち、三角形のプリズム形状の凹凸をサークル状に形成した模様を、屈折面10aと同一ピッチ間隔で、且つ、同じ位置に位置を合わせて形成している。   The refracting surface 10a provided on the lower surface of the dial 10 is a surface provided with unevenness, and is an unevenness forming a triangular prism shape. And the unevenness forms a circle-like pattern along with a constant pitch interval, as shown in FIG. Further, the pattern surface 10b provided on the upper surface of the dial plate 10 has the same pattern as the refracting surface 10a, that is, a pattern in which triangular prism-shaped irregularities are formed in a circle shape at the same pitch interval as the refracting surface 10a, and They are formed at the same position.

図2は上記の形状をなす屈折面の光の屈折状況を説明する説明図で、見やすくするために屈折面を上面側に描いてある。屈折面10aへの入射光R3、R4は屈折面10aの入射点Q3、Q4で屈折を起こす。そして、その屈折光S3、S4が文字板10内を直進する。屈折面が三角形のプリズム形状をなしてサークル状になっているので屈折面が全て曲面になっている。このため、入射点Q3、Q4の屈折光S3、S4は全く同じ方向には屈折せず、それぞれ異なった方向に屈折する。そして、その屈折光が文字板10内を直進し、上面の模様面10bで再び屈折を起こしながら外部に放射される。これによって、ソーラセルからの反射光の多くが屈折面によって屈折して、且つ四方に分散して文字板10を透過するのでソーラセルの濃紫色が掻き消されて、文字板から濃紫色が見えなくなる。また、文字板をどの方向から見ても同じ状態で見ることができる。   FIG. 2 is an explanatory diagram for explaining the light refraction state of the refracting surface having the above-mentioned shape, and the refracting surface is drawn on the upper surface side for easy viewing. The incident lights R3 and R4 on the refracting surface 10a are refracted at the incident points Q3 and Q4 of the refracting surface 10a. Then, the refracted lights S3 and S4 travel straight through the dial 10. Since the refracting surface has a triangular prism shape and is in the shape of a circle, the refracting surfaces are all curved. For this reason, the refracted lights S3 and S4 at the incident points Q3 and Q4 are not refracted in exactly the same direction, but are refracted in different directions. Then, the refracted light travels straight through the dial 10 and is radiated to the outside while being refracted again on the upper patterned surface 10b. As a result, most of the reflected light from the solar cell is refracted by the refracting surface, is dispersed in all directions and passes through the dial plate 10, so that the dark purple color of the solar cell is erased and the deep purple color cannot be seen from the dial plate. In addition, the dial can be seen in the same state from any direction.

ここで、三角形のプリズム形状をした屈折面は、図3に示すように、凹部の角度βは90度に形成してある。従って、凸部の角度αも90度になっている。また、凹凸の高さhは略70μmに形成しているのでピッチ間隔pは略140μmになっている。ここで、凹部の角度βは屈折面の角度を形成することになるが、この角度βは90度±10度の範囲内で形成するのが良いとされている。凹凸のピッチ間隔pは30〜150μmの範囲内で形成するのが良い。ピッチ間隔pが150μmより大きくなってくると目にこの凹凸の溝が見えてきて外観上好ましくない。また、30μmより小さくするのは原型の加工面で難しさが出てきて精度の良いものが得られない。また、このピッチ間隔pはどれも絶えず一定寸法にして形成するのが良い。このピッチ間隔にバラツキが発生すると屈折・分散光の分布にムラが現れてきて文字板に明るいところと暗いところの明暗のムラが現れるようになる。着色した文字板では色調の濃淡などのムラが発生しない。   Here, as shown in FIG. 3, the triangular refractive prism-shaped refracting surface is formed such that the concave portion has an angle β of 90 degrees. Accordingly, the angle α of the convex portion is also 90 degrees. Further, since the height h of the unevenness is approximately 70 μm, the pitch interval p is approximately 140 μm. Here, the angle β of the concave portion forms the angle of the refracting surface, but this angle β is preferably formed within a range of 90 ° ± 10 °. The pitch pitch p of the unevenness is preferably formed within a range of 30 to 150 μm. When the pitch interval p is larger than 150 μm, the uneven grooves are visible to the eyes, which is not preferable in appearance. Further, it is difficult to make the size smaller than 30 μm on the original processed surface, and a high-precision product cannot be obtained. In addition, it is preferable that the pitch interval p is constantly formed with a constant dimension. When variations occur in the pitch interval, unevenness appears in the distribution of refraction / dispersed light, and bright and dark unevenness appears in the bright and dark areas on the dial. The colored dial does not cause unevenness such as shades of color.

以上述べたように、屈折面の凹凸を三角形のプリズム形状にしてサークル状に、上記述べた寸法で、形成することによって、ソーラセルからの反射光は屈折面で色々な方向に屈折・分散する。このことにより、ソーラセルの濃紫色が良く掻き消されて文字板から濃紫色が見えなくなる。また、文字板に明るさの明暗などのムラ発生しない。   As described above, by forming the concave and convex portions of the refractive surface into a triangular prism shape in the shape of the circle as described above, the reflected light from the solar cell is refracted and dispersed in various directions on the refractive surface. As a result, the dark purple of the solar cell is well erased and the dark purple cannot be seen from the dial. In addition, unevenness such as brightness of the dial does not occur.

また、文字板10の上面の模様面10bに凹凸のあるサークル状の模様を形成する場合に、このサークル模様を屈折面10aと同じピッチ間隔のサークル模様にし、同じ位置になるようにして形成している。これによって、従来発生を見たモアレ縞の発生をなくすことができる。同じサークル模様でも双方のピッチ間隔が異なると、程度の違いはあるにせよ、モアレ縞が発生する。また、同じピッチ間隔でも形成する位置のズレが大きいとモアレ縞が発生する。時計用文字板の装飾模様としてサークル模様は比較的多く用いられる。従来、モアレ縞の発生などを見て外観的に良いものができなかったが、本発明の構成によりモアレ縞の発生しない見栄えの良い文字板を得ることができた。   In addition, when forming an uneven circle pattern on the pattern surface 10b on the upper surface of the dial plate 10, the circle pattern is formed into a circle pattern having the same pitch interval as that of the refracting surface 10a and formed at the same position. ing. As a result, it is possible to eliminate the occurrence of moire fringes that have been observed in the past. Even if the pitch between the two patterns is different even if the circle pattern is the same, moire fringes are generated, albeit to some extent. In addition, when the displacement of the positions to be formed is large even at the same pitch interval, moire fringes are generated. As a decorative pattern for a timepiece dial, a circle pattern is relatively often used. Conventionally, the appearance of the moire fringes has not been improved, but the appearance of the dial with no appearance of moire fringes can be obtained by the configuration of the present invention.

尚、本実施の形態では、模様面10bのサークル模様は屈折面10aの三角形プリズム形状のサークル模様と全く同じ形状で形成したが、特に角度や高さも同一である必要はなく、凹凸の高さが多少変わっても、凹部と凸部が上下に入れ替わっても良いもので、ピッチ間隔と位置が合っていればモアレ縞は発生しないことが判明した。   In the present embodiment, the circle pattern of the pattern surface 10b is formed in exactly the same shape as the circle pattern of the triangular prism shape of the refracting surface 10a. However, the angle and the height need not be particularly the same, and the height of the unevenness It was found that the moiré fringes are not generated if the pitch interval and the position are matched, even if the angle changes slightly.

次に、上記構成を取る文字板の作り方を説明する。先ず最初に、文字板10の屈折面10aと同じ形状をなす原型を製作する。この原型は、屈折面が三角形のプレズム形状でサークル模様にできているから、先端を三角形状に成形した切削バイトを用いてNC加工旋盤で簡単に製作することができる。次に、この原型に厚く金属メッキ(電鋳メッキ)を行い、その後、原型から剥離して屈折面の形状を転写した電鋳型を製作する。同様にして、模様面10bを形成する原型を製作し、それを用いて電鋳型を製作する。そして、この2種類の電鋳型を射出成形用の固定型キャビティ金型と可動型キャビティ金型にして射出成形を行うと文字板10の形状が得られる。   Next, a description will be given of how to make a dial having the above configuration. First, a prototype having the same shape as the refractive surface 10a of the dial plate 10 is manufactured. Since this prototype has a plasmoscopic shape with a refracting surface and a circle pattern, it can be easily manufactured with an NC machining lathe using a cutting tool having a triangular tip. Next, a thick metal plating (electroforming plating) is performed on the original mold, and then an electroforming mold is manufactured by peeling the original mold and transferring the shape of the refractive surface. Similarly, an original mold for forming the pattern surface 10b is manufactured, and an electroforming mold is manufactured using it. The shape of the dial 10 can be obtained by performing injection molding using the two types of electric molds as a fixed cavity mold for injection molding and a movable cavity mold.

このように、三角形のプリズム形状を持つサークル模様は、簡単な形状の切削バイトとNC加工旋盤を用いて簡単に原型を製作することができる。原型を安く、早く製作することができるので文字板のコストもその分下げる効果が現れる。   As described above, a circle pattern having a triangular prism shape can be easily manufactured using a simple cutting tool and an NC machining lathe. Since the prototype can be manufactured cheaply and quickly, the cost of the dial will be reduced accordingly.

次に、本発明の第2実施形態に係る時計用文字板を図4を用いて説明する。図4は屈折面の平面図を示したもので、文字板20の下面の屈折面20aを、凹凸を三角形のプリズム形状にして、それを同一ピッチで渦巻き状の模様に形成したものである。また、図示はしていないが文字板20の上面の模様面は、屈折面20aと同じ形状の渦巻き状の模様を位置を合わせて形成してある。   Next, a timepiece dial according to a second embodiment of the present invention will be described with reference to FIG. FIG. 4 shows a plan view of the refracting surface, in which the refracting surface 20a on the lower surface of the dial plate 20 is formed into a triangular prism shape with concavities and convexities formed in a spiral pattern at the same pitch. Although not shown, the pattern surface on the upper surface of the dial 20 is formed by aligning the spiral pattern having the same shape as the refractive surface 20a.

ここで、三角形のプリズム形状の凹凸寸法などは前述の第1実施形態のものと同じ寸法を取っている。屈折面を渦巻き状の模様に形成してもその効果は前述の第1実施形態で述べた効果と同じ効果が得られる。   Here, the concave and convex dimensions of the triangular prism shape are the same as those of the first embodiment. Even if the refracting surface is formed in a spiral pattern, the same effect as that described in the first embodiment can be obtained.

次に、本発明の第3実施形態に係る時計用文字板を図5を用いて説明する。図5は本発明の第3実施形態に係る時計用文字板の要部断面図と平面図を示していて、図5の(a)図は要部断面図、(b)図は(a)図における屈折面の平面図を示したものである。図5より、この文字板30は下面に屈折面30a、上面に模様面30bを設けているが、下面の屈折面30aは、前述の第1実施形態の屈折面と全く同じ形状の模様、即ち、三角形のプリズム形状の凹凸を設け、それをサークル状の模様に形成している。一方、上面の模様面30bは凹凸を設けて格子状の模様に形成している。更に、この格子状の模様に粗面加工を施して微小な凹凸を無数に設けている。   Next, a timepiece dial according to a third embodiment of the present invention will be described with reference to FIG. FIG. 5 shows a cross-sectional view and a plan view of a main part of a timepiece dial according to a third embodiment of the present invention. FIG. 5 (a) is a cross-sectional view of the main part, and FIG. The top view of the refractive surface in a figure is shown. As shown in FIG. 5, the dial 30 is provided with a refracting surface 30a on the lower surface and a pattern surface 30b on the upper surface. The lower refracting surface 30a is a pattern having the same shape as the refracting surface of the first embodiment. The triangular prism-shaped irregularities are provided to form a circle pattern. On the other hand, the pattern surface 30b on the upper surface is provided with irregularities to form a lattice pattern. Further, the lattice-like pattern is roughened to provide innumerable minute irregularities.

屈折面30aの凹凸を三角形のプリズム形状でサークル状模様に形成したことで、前述の第1実施形態と同じ作用が得られ、ソーラセルからの反射光が屈折して四方に分散し、ソーラセルの濃紫色が掻き消されて文字板から濃紫色が見えなくなる。更に、格子状の模様を形成した模様面30bを粗面にしてあるので、屈折・分散して文字板を透過した光はその粗面でまた分散されるので、ソーラセルの濃紫色は尚一層完全に掻き消されて全く現れなくなる。   By forming the concavo-convex surface of the refracting surface 30a into a triangular pattern with a triangular prism shape, the same action as in the first embodiment described above can be obtained, and the reflected light from the solar cell is refracted and dispersed in all directions. The purple color is erased and the dark purple color disappears from the dial. Further, since the pattern surface 30b on which the lattice-like pattern is formed is roughened, the light that has been refracted / dispersed and transmitted through the dial is dispersed again on the rough surface, so the dark purple color of the solar cell is even more complete. It disappears and disappears at all.

凹凸のある屈折面30aを粗面にすることによってソーラセルの反射光を尚一層分散させることもできるが、逆に、ソーラセルに向かって反射される光も現れてきて、屈折面からの透過光が全体的に少なくなる。このため、文字板が暗っぽくなってしまう。しかしながら、本実施の形態のように模様面に粗面加工を施すと、文字板が暗っぽくなると云うことが起きず、逆に明るくするような作用を及ぼす。   By making the uneven refracting surface 30a rough, the reflected light of the solar cell can be further dispersed, but conversely, light reflected toward the solar cell also appears, and the transmitted light from the refracting surface is reflected. Overall less. For this reason, a dial will become dark. However, when the rough surface is applied to the pattern surface as in the present embodiment, the dial does not become dark, and the effect is to make it brighter.

ここで、模様面30bに設けた格子状の模様の形状は設計仕様に合わせて適宜設定すれば良い。   Here, the shape of the lattice pattern provided on the pattern surface 30b may be set as appropriate in accordance with the design specifications.

次に、本発明の第4実施形態に係る時計用文字板を図6を用いて説明する。図6は本発明の第4実施形態の時計用文字板の要部断面拡大図を示したものである。この文字板40の下面の屈折面40aは、半円形のレンズ形状の凹凸にして、それをサークル状の模様に形成している。上面の模様面40bは屈折面40aの模様と同じ模様を同一ピッチで同じ位置に形成している。   Next, a timepiece dial according to a fourth embodiment of the present invention will be described with reference to FIG. FIG. 6 is an enlarged cross-sectional view of a main part of a timepiece dial according to a fourth embodiment of the present invention. The refracting surface 40a on the lower surface of the dial 40 is formed into a semicircular lens-shaped concavo-convex shape so as to form a circle pattern. The upper pattern surface 40b has the same pattern as the pattern of the refractive surface 40a formed at the same position at the same pitch.

上記の構成を取る文字板も前述の第1実施形態のものと同じ効果を生む。また、半円形のレンズ形状の凹凸も簡単な形状の切削バイトとNC加工旋盤で容易にその原型を製作すできる。   The dial plate having the above configuration produces the same effect as that of the first embodiment. In addition, semi-circular lens-shaped irregularities can be easily produced with a simple cutting tool and an NC machining lathe.

以上詳細に説明したように、本発明の文字板は、下面に三角形のプリズム形状、あるいは半円形のレンズ形状をなすサークル模様や渦巻き模様を形成している。サークル模様や渦巻き模様に形成することによってソーラセルの反射光に著しく分散が起き、ソーラセルの濃紫色を掻き消し見えなくさせる。また、三角形のプリズム形状、あるいは半円形のレンズ形状をなすサークル模様や渦巻き模様は、NC加工旋盤で容易にその原型を製作できるので安いコストで原型を作ることができる。   As described in detail above, the dial of the present invention has a circle pattern or spiral pattern forming a triangular prism shape or a semicircular lens shape on the lower surface. By forming a circle pattern or spiral pattern, the reflected light of the solar cell is significantly dispersed, and the dark purple color of the solar cell is erased and made invisible. In addition, a circle pattern or a spiral pattern having a triangular prism shape or a semi-circular lens shape can be easily produced on an NC machining lathe, so that the prototype can be produced at a low cost.

また、上面に設ける模様面としてサークル模様を形成する場合は、下面の屈折面に設けるサークル模様と同一ピッチで位置を合わせて形成すると、従来発生を見たモアレ縞は発生しなくなる。   Further, when a circle pattern is formed as a pattern surface provided on the upper surface, the moiré fringes that have been observed in the past do not occur if the circle pattern is formed at the same pitch as the circle pattern provided on the lower refractive surface.

また、粗面加工は上面の模様面に施すと良い。ソーラセルの反射光の分散を著しく促進させて尚一層濃紫色を掻き消すと同時に、著しい分散光によって文字板をより白さを増して明るくさせる。   The rough surface processing is preferably performed on the pattern surface on the upper surface. The dispersion of the reflected light of the solar cell is remarkably promoted to further erase the deep purple color, and at the same time, the dial is made brighter by increasing the whiteness by the remarkably dispersed light.

本発明は、特にソーラセルを用いた時計用文字板に利用するものである。   The present invention is particularly used for a timepiece dial using a solar cell.

本発明の第1実施形態に係る時計用文字板の要部断面図と平面図を示していて、図1の(a)図は要部断面図、(b)図は(a)図における屈折面の平面図である。The main part sectional drawing and top view of the timepiece dial which concern on 1st Embodiment of this invention are shown, (a) figure of FIG. 1 is principal part sectional drawing, (b) figure is the refraction | bending in (a) figure It is a top view of a surface. 図1における屈折面の光の屈折状況を説明する説明図である。It is explanatory drawing explaining the refraction state of the light of the refracting surface in FIG. 図1におけるB部の拡大図である。It is an enlarged view of the B section in FIG. 本発明の第2実施形態に係る時計用文字板の屈折面の平面図である。It is a top view of the refracting surface of the timepiece dial according to the second embodiment of the present invention. 図5は本発明の第3実施形態に係る時計用文字板の要部断面図と平面図を示していて、図5の(a)図は要部断面図、(b)図は(a)図における屈折面の平面図である。FIG. 5 shows a cross-sectional view and a plan view of a main part of a timepiece dial according to a third embodiment of the present invention. FIG. 5 (a) is a cross-sectional view of the main part, and FIG. It is a top view of the refractive surface in a figure. 図6は本発明の第4実施形態の時計用文字板の要部断面拡大図である。FIG. 6 is an enlarged cross-sectional view of a main part of a timepiece dial according to a fourth embodiment of the present invention. 特許文献1に示されたマスク板(文字板)の形状を示す図で、(a)図は断面図、(b)図は(a)図における屈折面の平面図である。It is a figure which shows the shape of the mask board (character board) shown by patent document 1, (a) A figure is sectional drawing, (b) A figure is a top view of the refractive surface in (a) figure. 図7における屈折面の変形例を示した断面図である。It is sectional drawing which showed the modification of the refractive surface in FIG. 図7における屈折面の他の形状を示したもので、(a)図は平面図、(b)図は(a)図におけるA−A断面図である。FIG. 8 shows another shape of the refracting surface in FIG. 7, where (a) is a plan view, and (b) is a cross-sectional view taken along line AA in FIG. 7 (a). 図7の(b)図で示された屈折面のストライプ状の三角柱プリズム面を横向きに配置して両目で見た状態を示した説明図である。It is explanatory drawing which showed the state seen from both eyes, arrange | positioning the stripe-shaped triangular prism prism surface of the refractive surface shown by FIG.7 (b) figure sideways. ストライプ状に形成した三角柱プリズム面の光の屈折状態を説明する説明図である。It is explanatory drawing explaining the refractive state of the light of the triangular prism surface formed in stripe form.

符号の説明Explanation of symbols

10、20、30、40 文字板
10a、20a、30a、40a 屈折面
10b、30b、40b 模様面
10, 20, 30, 40 Dial
10a, 20a, 30a, 40a Refractive surface 10b, 30b, 40b Pattern surface

Claims (2)

ソーラセルを下面側に備え、多数のプリズムあるいはレンズ状の凹凸からなる屈折面を下面に形成した時計用文字板であって、前記屈折面の凹凸は三角形のプリズム形状あるいは半円形のレンズ形状をなしてサークル状又は渦巻き状の模様に形成した時計用文字板において、前記文字板の上面は凹凸を有する模様面になっており、該模様面が前記屈折面に形成したサークル状又は渦巻き状の模様と同一模様を同一ピッチ間隔に、位置を合わせて形成したことを特徴とする時計用文字板。 Comprising a solar cell on the lower surface side, a number of prismatic or refractive surface comprising a lens-shaped irregularities a timepiece dial that is formed on the lower surface, unevenness of the refracting surface forms a prism shape or semi-circular lens shape of a triangle In the watch dial formed in a circle or spiral pattern, the upper surface of the dial is a pattern surface having irregularities, and the circle or spiral pattern formed on the refractive surface of the pattern surface The timepiece dial is characterized in that the same pattern is formed at the same pitch interval with the same position . 前記サークル状又は渦巻き状の模様に形成した前記屈折面の凹凸は、そのピッチ間隔が30〜150μmの範囲にあって、且つ、同じピッチ間隔で形成したことを特徴とする請求項1に記載の時計用文字板。   2. The unevenness of the refracting surface formed in the circle or spiral pattern has a pitch interval of 30 to 150 μm and is formed at the same pitch interval. Clock dial.
JP2003299418A 2003-08-25 2003-08-25 Clock dial Expired - Fee Related JP4516292B2 (en)

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JP4804047B2 (en) * 2005-06-23 2011-10-26 シチズン時計河口湖株式会社 Clock face with solar cell
JP5060138B2 (en) * 2007-02-20 2012-10-31 富士通コンポーネント株式会社 Optical window member
JP5392018B2 (en) * 2009-11-16 2014-01-22 セイコーエプソン株式会社 Clock dial and clock
CN102947764B (en) * 2010-06-23 2015-09-16 西铁城控股株式会社 Watch display plate
JP5671987B2 (en) * 2010-12-07 2015-02-18 セイコーエプソン株式会社 Clock dial and clock
JP5652192B2 (en) * 2010-12-20 2015-01-14 セイコーエプソン株式会社 Clock dial and clock
JP5190136B2 (en) * 2011-06-13 2013-04-24 シチズン時計河口湖株式会社 Clock face with solar cell
JP6056167B2 (en) * 2012-03-28 2017-01-11 セイコーエプソン株式会社 clock
JP6056168B2 (en) * 2012-03-28 2017-01-11 セイコーエプソン株式会社 clock
TW201621242A (en) * 2014-12-03 2016-06-16 Metal Ind Res & Dev Ct Multi-spiral optical device

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JPH1138158A (en) * 1997-07-22 1999-02-12 Kawaguchiko Seimitsu Kk Dial for time piece
JP2002139578A (en) * 2000-11-01 2002-05-17 Kawaguchiko Seimitsu Co Ltd Watch dial and its manufacturing method
JP2003110129A (en) * 2001-09-28 2003-04-11 Kawaguchiko Seimitsu Co Ltd Mask plate for solar battery, dial for watch and method for manufacturing mask plate

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JPH10253773A (en) * 1997-01-08 1998-09-25 Seiko Epson Corp Covering member used to cover surface of solar cell and electronic apparatus provided with it as well as watch
JPH1138158A (en) * 1997-07-22 1999-02-12 Kawaguchiko Seimitsu Kk Dial for time piece
JP2002139578A (en) * 2000-11-01 2002-05-17 Kawaguchiko Seimitsu Co Ltd Watch dial and its manufacturing method
JP2003110129A (en) * 2001-09-28 2003-04-11 Kawaguchiko Seimitsu Co Ltd Mask plate for solar battery, dial for watch and method for manufacturing mask plate

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